the TransMac desktop icon or start menu shortcut. Select Run as administrator . Click Yes on the User Account Control (UAC) prompt. Try formatting or writing to the drive again. 2. Close Background Windows Processes
Locate in the list, right-click it, and select Restart . Disable Antivirus and Security Software
: Ensure your USB drive doesn't have a physical write-protect switch. You can also try clearing software write-protection in Diskpart by typing attributes disk clear readonly after selecting the disk. Step 4: Alternative Tools
Having the drive open in a file window.
Type list disk to find your USB drive's number (e.g., Disk 1). Type select disk X (replace X with your drive number). Type clean . This will erase everything on the drive. Once finished, try formatting the drive again in TransMac.
Transmac Drive Has Been Locked By Another Program: Causes and Solutions
If you see this error, don't blame the software immediately. If that fails, the software is likely incompatible with your specific USB controller or antivirus suite. Transmac Drive Has Been Locked By Another Program
Sometimes, the "locked" error is a false flag for physical corruption. If you have tried all 7 fixes and the problem persists, test the drive in ( diskmgmt.msc ).
Many users report that the lock error occurs consistently with the same USB drive, even after rebooting. This points to .
Emily's eyes widened. "That's it! I knew it." the TransMac desktop icon or start menu shortcut
Windows and macOS use different file systems (NTFS/FAT32 vs. APFS/HFS+). When you plug a Mac-formatted drive into Windows, the OS gets confused. It may try to "fix" the drive or repeatedly prompt you to format it, which keeps the drive "busy" and prevents TransMac from gaining exclusive access. If these steps didn't work, tell me: What are you using? Are you using a USB 2.0 or 3.0 drive? Did you get a specific error code ?
Uninstall or fully close these programs, checking the Windows system tray (bottom right corner) to ensure no background agents are running. 5. Change the USB Port
Windows has the drive open, perhaps showing a dialog box asking to "Format the disk" (since Windows doesn't natively read Mac formats). Try formatting or writing to the drive again